SKF
SKF 727 ACD/HCP4A Angular Contact Ball Bearing
Product Code:727 ACD/HCP4A
Description
Technical specification MetricImperial DIMENSIONS d 7 mmD 22 mmB 7 mmd1 12.6 mmd2 12.6 mmD1 17.4 mmr1,2min. 0.3 mmr3,4min. 0.2 mma 7.1 mm ABUTMENT DIMENSIONS damin. 9.4 mmdbmin. 9.4 mmDamax. 19.6 mmDbmax. 20.2 mmramax. 0.3 mmrbmax. 0.2 mmdn 13.6 mm CALCULATION DATA Basic dynamic load ratingC 2.91 kNBasic static load ratingC0 1.12 kNFatigue load limitPu 0.034 kNAttainable speed for grease lubrication 85000 r/minAttainable speed for oil-air lubrication 130000 r/minContact angle? 25 °Ball diameterDw 3.969 mmNumber of ballsz 9Reference grease quantityGref 0.162 cm³PRELOAD AND STIFFNESS (BACK-TO-BACK, FACE-TO-FACE)Preload class AGA 18 NStatic axial stiffness, preload class A 30 N/µmPreload class BGB 36 NStatic axial stiffness, preload class B 39 N/µmPreload class CGC 72 NStatic axial stiffness, preload class C 51 N/µmPreload class DGD 144 NStatic axial stiffness, preload class D 68 N/µmCALCULATION FACTORSCalculation factorf 1.02Calculation factorf1 0.99Calculation factorf2A 1Calculation factorf2B 1.01Calculation factorf2C 1.03Calculation factorf2D 1.06Calculation factorfHC 1.01Calculation factore 0.68Calculation factor (single, tandem)Y2 0.87Calculation factor (single, tandem)Y0 0.38Calculation factor (single, tandem)X2 0.41Calculation factor (back-to-back, face-to-face)Y1 0.92Calculation factor (back-to-back, face-to-face)Y2 1.41Calculation factor (back-to-back, face-to-face)Y0 0.76Calculation factor (back-to-back, face-to-face)X2 0.67 MASS Mass bearing 0.012 kg
Technical Specifications
Technical specification 
DIMENSIONS
| d | 7 mm | |
|---|---|---|
| D | 22 mm | |
| B | 7 mm | |
| d1 | 12.6 mm | |
| d2 | 12.6 mm | |
| D1 | 17.4 mm | |
| r1,2 | min. 0.3 mm | |
| r3,4 | min. 0.2 mm | |
| a | 7.1 mm |
ABUTMENT DIMENSIONS
| da | min. 9.4 mm | |
|---|---|---|
| db | min. 9.4 mm | |
| Da | max. 19.6 mm | |
| Db | max. 20.2 mm | |
| ra | max. 0.3 mm | |
| rb | max. 0.2 mm | |
| dn | 13.6 mm |
CALCULATION DATA
| Basic dynamic load rating | C | 2.91 kN |
|---|---|---|
| Basic static load rating | C0 | 1.12 kN |
| Fatigue load limit | Pu | 0.034 kN |
| Attainable speed for grease lubrication | 85000 r/min | |
| Attainable speed for oil-air lubrication | 130000 r/min | |
| Contact angle | ? | 25 ° |
| Ball diameter | Dw | 3.969 mm |
| Number of balls | z | 9 |
| Reference grease quantity | Gref | 0.162 cm³ |
| Preload class A | GA | 18 N |
|---|---|---|
| Static axial stiffness, preload class A | 30 N/µm | |
| Preload class B | GB | 36 N |
| Static axial stiffness, preload class B | 39 N/µm | |
| Preload class C | GC | 72 N |
| Static axial stiffness, preload class C | 51 N/µm | |
| Preload class D | GD | 144 N |
| Static axial stiffness, preload class D | 68 N/µm |
| Calculation factor | f | 1.02 |
|---|---|---|
| Calculation factor | f1 | 0.99 |
| Calculation factor | f2A | 1 |
| Calculation factor | f2B | 1.01 |
| Calculation factor | f2C | 1.03 |
| Calculation factor | f2D | 1.06 |
| Calculation factor | fHC | 1.01 |
| Calculation factor | e | 0.68 |
| Calculation factor (single, tandem) | Y2 | 0.87 |
| Calculation factor (single, tandem) | Y0 | 0.38 |
| Calculation factor (single, tandem) | X2 | 0.41 |
| Calculation factor (back-to-back, face-to-face) | Y1 | 0.92 |
| Calculation factor (back-to-back, face-to-face) | Y2 | 1.41 |
| Calculation factor (back-to-back, face-to-face) | Y0 | 0.76 |
| Calculation factor (back-to-back, face-to-face) | X2 | 0.67 |
MASS
| Mass bearing | 0.012 kg |
|---|